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@langchain/langgraph-sdk

v0.0.26

Published

Client library for interacting with the LangGraph API

Downloads

89,956

Readme

LangGraph JS/TS SDK

This repository contains the JS/TS SDK for interacting with the LangGraph REST API.

Quick Start

To get started with the JS/TS SDK, install the package

yarn add @langchain/langgraph-sdk

You will need a running LangGraph API server. If you're running a server locally using langgraph-cli, SDK will automatically point at http://localhost:8123, otherwise you would need to specify the server URL when creating a client.

import { Client } from "@langchain/langgraph-sdk";

const client = new Client();

// List all assistants
const assistants = await client.assistants.search({
  metadata: null,
  offset: 0,
  limit: 10,
});

// We auto-create an assistant for each graph you register in config.
const agent = assistants[0];

// Start a new thread
const thread = await client.threads.create();

// Start a streaming run
const messages = [{ role: "human", content: "what's the weather in la" }];

const streamResponse = client.runs.stream(
  thread["thread_id"],
  agent["assistant_id"],
  {
    input: { messages },
  }
);

for await (const chunk of streamResponse) {
  console.log(chunk);
}

Documentation

To generate documentation, run the following commands:

  1. Generate docs.

     yarn typedoc
  2. Consolidate doc files into one markdown file.

     npx concat-md --decrease-title-levels --ignore=js_ts_sdk_ref.md --start-title-level-at 2 docs > docs/js_ts_sdk_ref.md
  3. Copy js_ts_sdk_ref.md to MkDocs directory.

     cp docs/js_ts_sdk_ref.md ../../docs/docs/cloud/reference/sdk/js_ts_sdk_ref.md